Increased pathogenicity of an Ehrlichia-like agent after passage through Amblyomma hebraeum: a preliminary report

After being passaged through 3 generations of Amblyomma hebraeum, an Ehrlichia-like agent isolated from an adult Hyalomma truncatum female became more pathogenic and elicited a disease in sheep indistinguishable from heartwater. Cross-immunity between this agent and several stocks of Cowdria ruminan...

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Vydané v:Onderstepoort journal of veterinary research Ročník 57; číslo 4; s. 233
Hlavný autor: du Plessis, J L
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: South Africa 01.12.1990
Predmet:
Animals
Cattle
Cattle Diseases - etiology
Cross Reactions
Ehrlichia - immunology
Ehrlichia - pathogenicity
Rickettsia - immunology
Rickettsiaceae Infections - etiology
Rickettsiaceae Infections - veterinary
Serial Passage
Sheep
Sheep Diseases - etiology
Ticks - microbiology
ISSN:0030-2465
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Shrnutí:After being passaged through 3 generations of Amblyomma hebraeum, an Ehrlichia-like agent isolated from an adult Hyalomma truncatum female became more pathogenic and elicited a disease in sheep indistinguishable from heartwater. Cross-immunity between this agent and several stocks of Cowdria ruminantium and high levels of antibody elicited by the agent against 2 stocks of C. ruminantium in the indirect fluorescent antibody test, confirmed its close relationship to Cowdria.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0030-2465